3630309

Information

• Patent Grant
• 3630309

• References
• Source

• Patent Number

  3,630,309

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1971
  53 years ago

• CPC

  • E04B1/8236 - Stage shells

• US Classifications

  • 181 - Acoustics
  • 160 - Flexible or portable closure, partition, or panel